Systems, methods, and compositions of insect repellent briquettes

Abstract

Systems, methods, and compositions to provide insect repellent briquettes for cooking stoves are provided. For example, a fuel briquette composition may include a heating fuel, a first source of an insect repellent, and a second source of the insect repellent, where the second source is different from the first source. As another example, a fuel briquette may include a heating fuel, an accelerant comprising pymarc, a first amount of pyrethrin distributed interstitially between the heating fuel and the accelerant, and a second amount of pyrethrin contained within the pymarc. As a further example, a method of making a fuel briquette may include processing a chrysanthemum material to produce a liquid additive and a solid pymarc, forming a briquette mixture that includes a heating fuel, the solid pymarc, and the liquid additive, and compressing and drying the briquette mixture to form a fuel briquette.

What is claimed is: 
     
       1. A fuel briquette composition comprising:
 a heating fuel; 
 a first source of an insect repellent; and 
 a second source of the insect repellent, wherein the second source is different from the first source. 
 
     
     
       2. The fuel briquette composition of  claim 1 , wherein the insect repellent comprises one or more pyrethrin compounds. 
     
     
       3. The fuel briquette composition of  claim 1 , wherein the first source comprises a liquid additive. 
     
     
       4. The fuel briquette composition of  claim 3 , wherein the second source comprises a byproduct from production of the liquid additive. 
     
     
       5. The fuel briquette composition of  claim 1 , wherein the first source is a liquid material and the second source is a solid material. 
     
     
       6. The fuel briquette composition of  claim 5 , wherein the first source comprises pyrethrum extracted from chrysanthemum plants. 
     
     
       7. The fuel briquette composition of  claim 6 , wherein the second source comprises pymarc. 
     
     
       8. The fuel briquette composition of  claim 1 , wherein the second source is configured to accelerate combustion of the fuel briquette. 
     
     
       9. The fuel briquette composition of  claim 1 , wherein the insect repellent is at least 0.03 wt. % of the fuel briquette composition. 
     
     
       10. The fuel briquette composition of  claim 9 , wherein the fuel briquette further comprises (i) an accelerant that includes the second source of the insect repellent and (ii) a binder, and wherein:
 the heating fuel comprises charcoal powder and is approximately 65 wt. % of the fuel briquette composition; 
 the accelerant is approximately 28 wt. % of the fuel briquette composition; and 
 a mixture of the insect repellent and the binder is approximately 7 wt. % of the fuel briquette composition. 
 
     
     
       11. A fuel briquette comprising:
 a heating fuel; 
 an accelerant comprising pymarc; 
 a first amount of pyrethrin distributed interstitially between the heating fuel and the accelerant; and 
 a second amount of pyrethrin contained within the pymarc, wherein the first amount of pyrethrin and the second amount of pyrethrin are configured to vaporize with products of combustion of the heating fuel to thereby repel insects from a surrounding area. 
 
     
     
       12. The fuel briquette of  claim 11 , wherein the fuel briquette comprises at least 0.03 wt. % of pyrethrin. 
     
     
       13. The fuel briquette of  claim 12 , wherein at least 0.01 wt. % of the pyrethrin in the fuel briquette is sourced from the pymarc. 
     
     
       14. The fuel briquette of  claim 12 , comprising a liquid additive that includes the first amount of pyrethrin, wherein at least 0.01 wt. % of the pyrethrin in the fuel briquette is sourced from the liquid additive. 
     
     
       15. The fuel briquette of  claim 14 , wherein the liquid additive is an extraction from the pymarc. 
     
     
       16. The fuel briquette of  claim 11 , comprising a binder and an additional accelerant, wherein the binder comprises one or more of starch, clay, or soil, and wherein the additional accelerant comprises agricultural waste or sawdust. 
     
     
       17. A method of making a fuel briquette, the method comprising:
 (a) processing a chrysanthemum material to produce a liquid additive and a solid pymarc; 
 (b) forming a briquette mixture that comprises:
 a heating fuel; 
 the solid pymarc; and 
 the liquid additive; 
 
 (c) compressing the briquette mixture with a compression machine to form a compressed briquette mixture; and 
 (d) drying the compressed briquette mixture to form a fuel briquette. 
 
     
     
       18. The method of  claim 17 , wherein the fuel briquette comprises at least 0.03 wt. % of pyrethrin contributed partially from the liquid additive and partially from the solid pymarc. 
     
     
       19. The method of  claim 17 , wherein forming the briquette mixture comprises:
 forming a first intermediate mixture from at least the heating fuel and the solid pymarc; 
 forming a second intermediate mixture from at least a binder and the liquid additive; and 
 combining the first intermediate mixture with the second intermediate mixture to form the briquette mixture. 
 
     
     
       20. The method of  claim 19 , comprising diluting the liquid additive with a solvent, wherein drying the compressed briquette mixture evaporates the solvent.